Grinding-disk.



PATmiTED DEC. 15, 1903.

D. J. MURNANE GRINDING DISK APPLICATION FILED APR.19. 1902.

3'SHE'ETSSHEBT 1.

.110 MODEL.

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INVENTOR 2 M D. J. MURNANE. GRINDING DISK. APPLICATION FILED APR.119, 1902.

W MW no MODEL.

PATENTED DECI15I19O3.

D. J MURNANE. GRINDING DISK. APPLICATION FILED APR. 19, 1902.

'3 SHEETS-SIGHT 3 NVENTOR giwb'a 1/ SW I emcee;-

Patented December 115-, 31803 'UFHQIE; Y 1

. MESSOURL enamels or KIRKWOOD,liHSSOURI, ASSIGNOR To The ST. 111 oomrnnr, or vALLEvPARK, MISSOURI, A. consoe ease.

.hpylioation filed April 19, 1902- i'ilmllai' forming yart of Letters Patent No, "847,2Q8, dated December 19-030 Serial in 103,765. "(No model.)

WHEEL J. MURNANE, onnty, Missouri, have i 1: is full, clear, and onset :mzee being had to the so in which- 1 side elevation, partly in a machine constructed J nveneion and adapted iiates or slabs of glass, stone r; is a similar view show IQ of invention to a me 'ng send, he Fig. 3 show: o, side elevation, partly l the meehanism whieh is prel Y "for feeding the abrasive to the 911 mil 1 Fig 5 is a plan f the disk used in the 2.

hereon in section. modified construction of L the grindingsnrfziee Fig. 8 is aside view 8: 11 1,

n36 abrasive or the material to he pulverined to the surface of. the disk during its rotation by feeding it thereto in each manner the (iislcniay be used when in a vertieal. or any other position.

.lu. the n sings, 1, 3, and 4, 2 is the grindi i i: set in an. upright plane, having e, hols s and mounted on a rotary shaft or axis 4;.

5 are passages which extend outwardly the dish from the middle portion and com uinnieate with passages 6, leading through the hub for the supply of abrasive material, The passages i are preferably formed by making the dish of a plate B, having its inner face grower]. or recessed and covered by Joe which may he held to-the plate by i is [iii G rinding-lllislr drawings, forming part of this pulley l2 and has a spring end hearing enz i-pted to grind or polish bolts '21 and are separated atintervals to con stitnte slots or openings Loommunioating withthe passages 5. The slots 7 are'ineiined in the direction opposite to. the direction oi rotation of the disk. The passages 6 extend spirally in the hub to a stationary collar 8, whiohisset loosely and independently around the hub at the hack of the disk.- it eonnested with apipe or passage 9 for the introduction of the abrasive material, preferably mixed With-water. When the abrasive is fed to the collar 8, the rotation of the hub will cause it toenter the spiral passages 6 and the edges of a pile of glass plates 10, which i are heid on a movable table 11. The shaft 4, on Which the disk is mounted, is driven by a 123, which enables theidisk to yield haoigirardy somewhat when the plates or other artioles .o be ground are pressed against it. The spring; may be disconnected and the disk, rendered unyielding when it is desired to true the artioles to a given width.

In Fig. 2 I show a modified application of my in'veution,iu which the disk is used for pulverizing sand or other abrasive for the purpose of fitting it for the grinding or smoothing of glass and like materials. In this case the rotary disk 2 is set opposite to a stationary companion disk 14, which is mounted upon a rod 15, having a spring 16, which presses it against the disk 2, and thus tahes up the wear of both snrfacesand supplies the pressurerequired for pulverizing. The rod 15 and the shaft 4; are lined so that they are in exactly the same axial plane, and the grindstructed as above descri'bed,'except that the passages *,as shownin Fig. 5, are short and do 1110i: extend to the periphery of the disk. The

disk 2 and is pulverized material to be pulverized is therefore fed near the axis of rotation and is forced outwardly between the faces of the disks 2' and 14 by and discharged at the periphery in the desired powdered condition. Ahood 17, provided with anexhaustfan, may be placed around the diskto convey the pulverized material to a convenient receptacle.

In the modification of my invention shown in Figs. 7 and 8 the disk isprovided with peripheral grinding-surface, and the abrasive material is fed. thereto through passages 5', constituted, preferably, by sector-plates D,

spaced a slight distance apart and covered by The plates D preferably project a plate 0. somewhat beyond the peripheries of the plates I Band C, 'and the periphery of the disk may be shaped as desired for the grinding of moldings or other curved or beveled shapes;

' -If desired, the shaft i maybe extended.

through the cover-plate C, soas to adord a bearing on both sides of the disk, as indicated by dotted lines in Fig. 8.

' Within. the scope of my invention the con struction of the apparatus maybe modified For examp1e,'the passages through the disk' may be constituted -otherwise than as abovestated, and within the scope of" my broader claims the abrasive material may be introduced through the hub or central part of the disk from the back thereof otherwisethan by the spiral conveyer shown in the drawingsg'.

sages extending outwardly from its middle Iclaim- 1 l. A grinding or polishing disk havingpassages. extending outwardly in thesameplane with the disk from its middle portion and communicating with the working face of the disk, and means adapt-ed to introduce abrasive material at the-back of the disk and at its middle portion; substantially as described.

2. A grinding or'polishing disk having pasthe centrifugahforce .of the rotating ing-surface;

portion in the same plane with the disk andcommunicating with the working face of the disk by inclined openings, and meansadapted to introduce abrasive material at the back of the disk and at its middle portion; substantially as described.

3. A grinding or polishing disk having a rotary hub, a conveyer rotating with the hub, and passages leading therefrom outwardly in the disk and communicating with the-working face; substantially as described.

4. A grinding or rotary hub, a con veyer rotating with the hub, and passages leading therefrom outwardly in ing faces, and a stationary collar through which abrasive ma'terialcan be introduced to the hub; substantially as described.

, 5. A grinding or polishing disk having passages extending outwardly. from the central polishing disk having a l the'disk and communicating with the workportion, and connected with slots in the work therewith, whereby the abrasive material. is.

fed from the back or opposite side to the grinding-surfa'ce; substantially as described. v

7. A rotary grinding or polishing disk set in an upright plane and having an inlet for abrasive material near-its center, and having passages leading therefrom to the periphery; substantially as describe a In testimony whereof I have hereunto set my hand. i v

Y DANIEL J. MURNANE.

Witnesses: Y

' GEO. B. Bnnume, v

THOMAS W. BAKEW LL. 

